On 11-12-27 5:58 PM, James Muller wrote:
Dear R-devel members,
The question: Is it possible to initialize and later free a large data
structure strictly within a shared C library, to be used by a function in
the C library that I'll call from R--without ever having to pass data to
and from R? This is analogous to C++ object initialization/use/destruction,
but if possible I'd like to stay in C.
Yes, if you use malloc or Calloc you'll get memory that you can manage
yourself. See Writing R Extensions, section 6.1.2.
Duncan Murdoch
The context: I'm implementing a particle swarm optimization of a
60-dimension nonlinear transform, where the transform is defined in a
half-gigabyte dataset. By carefully initializing a C struct I can trim a
large amount of work from the PSO iteration stage. This is, of course,
straight forward if I implement the whole thing in a self-contained C
program--however, I'd like R to handle the optimization routines, and my
shared library to implement the value function.
So: what do folks think?
Cheers,
James
[[alternative HTML version deleted]]
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
